After understanding the basics of simple series and parallel circuit, I bought different resistors to make my first prototype.
This design was composed of 75 groups of resistors in parallel. Each group was made of 5 resistors in series.
This montage produced 34 watts. For this montage I decided to set a single dew heater with the full power of 34 watts, because I thought this power could be just enough to heat the totality of the corrector plate.
So as to run this dew heater I used a computer power supply of 4 amperes and 145 watts. After a few seconds of running the resistor then produced heating.
To validate this montage I ran it during 6 hours to be sure of the liability of each resistor and to check whether one of them had burnt. I was now ready to test the prototype in real conditions